Overflow protection valve

Abstract

The utility model relates to the technical field of valves, and provides an overflowing protection valve which comprises a valve shell and a valve element assembly, the valve shell is provided with a valve cavity, the valve shell is provided with a first end and a second end which are opposite, the first end is provided with a fluid inlet, the second end is provided with a fluid outlet, and the fluid inlet and the fluid outlet communicate with the valve cavity; the valve element assembly comprises a valve rod, a valve element and an elastic piece which are arranged in the valve cavity, and the valve rod can reciprocate between the fluid inlet and the fluid outlet. The valve element is connected to the valve rod and used for opening or closing the fluid outlet. The elastic piece is arranged on the valve rod in a sleeving mode and used for providing reset elastic force for the valve element. The device can respond to the overflowing condition in time and cut off gas flow rapidly, meanwhile, the device has an automatic reset function, and the safety of liquefied gas in the using process is remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular provides an over-current protection valve. Background Art

[0002] Liquefied gas cylinders are mainly used to store liquefied gas, and are connected to gas appliances such as gas stoves through liquefied gas pipelines. In actual use, when liquefied gas pipelines are detached or damaged, a large amount of liquefied gas in the liquefied gas cylinder will leak, posing a high safety risk. Utility Model Content

[0003] The purpose of the embodiment of the present application is to provide an over-current protection valve, which is intended to solve the safety problem of large-scale leakage of liquefied gas when the liquefied gas pipeline is abnormal.

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] The present application provides an over-current protection valve, comprising:

[0006] A valve housing is provided with a valve cavity, the valve housing has a first end and a second end opposite to each other, the first end is provided with a fluid inlet, the second end is provided with a fluid outlet, the fluid inlet and the fluid outlet are in communication with the valve cavity;

[0007] The valve core assembly includes a valve stem, a valve core and an elastic member arranged in the valve cavity, wherein the valve stem can move back and forth between the fluid inlet and the fluid outlet; the valve core is connected to the valve stem and is used to open or close the fluid outlet; the elastic member is sleeved on the valve stem and is used to provide a reset elastic force for the valve core.

[0008] Optionally, the valve cavity comprises a containing chamber, the containing chamber is arranged on a side of the valve core, and an end of the containing chamber close to the fluid outlet is provided with an opening toward the valve core, and a blocking ball is provided in the containing chamber;

[0009] The over-flow protection valve has an inverted state and an upright state. In the inverted state, the blocking ball flows through the opening to between the valve core and the fluid outlet to prevent the valve core from closing the fluid outlet; in the upright state, the blocking ball flows through the opening to reset into the accommodating chamber.

[0010] Optionally, a blocking ring extending toward the valve core is formed on the inner edge of the fluid outlet, and in the inverted state, the blocking ring is used to block the blocking ball.

[0011] Optionally, a guide plate is provided at the opening of the accommodating chamber, and the guide plate is used to guide the flow of the blocking ball.

[0012] Optionally, the number of the accommodating chambers is at least two, and the accommodating chambers are arranged at intervals along the circumference of the valve core.

[0013] Optionally, the number of the blocking balls in each of the accommodating chambers is at least two, and each of the blocking balls is arranged along a direction from the first end to the second end of the valve housing.

[0014] Optionally, a bottom cover is provided at the first end of the valve housing, the bottom cover is provided with a plurality of the fluid inlets, and a first guide sleeve is provided in the middle of the bottom cover, and one end of the valve stem is inserted into the first guide sleeve.

[0015] Optionally, the second end of the valve housing is provided with an external pipe, and the external pipe is connected to the fluid outlet.

[0016] Optionally, a fixing frame is provided inside the external tube, a second guide sleeve arranged opposite to the first guide sleeve is provided on the fixing frame, and the other end of the valve stem is inserted into the second guide sleeve;

[0017] The elastic member is sleeved on the second guide sleeve and is located between the fixing frame and the valve core.

[0018] Optionally, the valve housing is detachably connected to the bottom cover.

[0019] The beneficial effect of the over-current protection valve provided in the present application is that the present application can promptly respond to over-current conditions and quickly cut off the airflow through the valve core assembly, and at the same time has an automatic reset function, which significantly improves the safety of liquefied gas use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of an over-current protection valve provided in an embodiment of the present application;

[0022] Figure 2 A structural cross-sectional view of an over-current protection valve provided in an embodiment of the present application;

[0023] Figure 3 One of the internal structure schematic diagrams of the over-current protection valve provided in the embodiment of the present application;

[0024] Figure 4 This is a second schematic diagram of the internal structure of the over-current protection valve provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figure are:

[0026] 1. Valve housing; 101. Valve core assembly; 102. First end; 103. Second end; 2. Valve cavity;

[0027] 3. Fluid inlet; 4. Fluid outlet; 5. Valve stem; 6. Valve core; 7. Elastic member; 8. Accommodation chamber;

[0028] 9. opening; 10. blocking ball; 11. blocking ring; 12. guide plate; 13. first plate;

[0029] 14. second plate; 15. third plate; 16. bottom cover; 17. first guide sleeve; 18. external tube;

[0030] 19. Fixed frame; 20. Second guide sleeve; 21. Through hole. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0032] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] According to one embodiment of the present application, referring to Figure 1-Figure 4As shown, the present application provides an over-current protection valve, which mainly includes: a valve housing 1 and a valve core assembly 101. The valve housing 1 is provided with a valve cavity 2, and the valve housing 1 has a first end 102 and a second end 103 opposite to each other. The first end 102 is provided with a fluid inlet 3, and the second end 103 is provided with a fluid outlet 4. The fluid inlet 3 and the fluid outlet 4 are connected to the valve cavity 2; the valve core assembly 101 includes a valve stem 5, a valve core 6 and an elastic member 7 arranged in the valve cavity 2, and the valve stem 5 can reciprocate between the fluid inlet 3 and the fluid outlet 4; the valve core 6 is connected to the valve stem 5, and is used to open or close the fluid outlet 4; the elastic member 7 is sleeved on the valve stem 5, and is used to provide a reset elastic force for the valve core 6.

[0035] In this embodiment of the present application, the valve housing 1 is the main body of the overcurrent protection valve, and a valve cavity 2 is formed inside. The valve cavity 2 has two ports, namely a fluid inlet 3 and a fluid outlet 4, which correspond to the input and output channels of the liquefied gas, respectively. Specifically, the bottom of the valve housing 1 is provided with a fluid inlet 3, and the fluid inlet 3 is used to connect to the gas outlet of the liquefied gas cylinder. The top of the valve housing 1 is provided with a fluid outlet 4, and the fluid outlet 4 is used to connect to the liquefied gas pipeline to ensure that the gas can be smoothly transmitted from the liquefied gas cylinder to the gas-using equipment.

[0036] The valve stem 5 is installed in the valve cavity 2 and can reciprocate along the direction from the fluid inlet 3 to the fluid outlet 4. It is a key component for controlling the flow of gas.

[0037] The valve core 6 is connected to the valve stem 5 and is directly responsible for opening or closing the fluid outlet 4 , and controls the gas flow through linkage with the valve stem 5 .

[0038] The elastic member 7 is sleeved on the valve stem 5. The elastic member 7 can be a spring. The function of the elastic member 7 is to provide a reset elastic force for the valve core 6 to ensure that the valve core 6 remains in an open state when there is no overflow, and to reset the valve core 6 after the overflow phenomenon ends.

[0039] Normal working state: When the liquefied gas flows normally, the user uses the liquefied gas through a gas stove and other equipment. At this time, the valve core 6 remains in an open state under the elastic force of the elastic member 7, and the liquefied gas enters from the fluid inlet 3, passes through the valve cavity 2, and flows out from the fluid outlet 4 smoothly to be supplied to the equipment.

[0040] Overcurrent protection mechanism: When the liquefied gas pipeline falls off, is damaged, or other abnormal conditions occur, resulting in an abnormal increase in the liquefied gas flow, the increased airflow thrust will act on the valve core 6, overcoming the elastic force of the elastic member 7, forcing the valve core 6 to move toward the fluid outlet 4 until the fluid outlet 4 is completely blocked. This process quickly cuts off the supply of liquefied gas, prevents a large amount of liquefied gas from leaking, and plays a role in overcurrent protection.

[0041] Automatic recovery function: Once the abnormal airflow stops, that is, the over-flow phenomenon disappears, the elastic force of the elastic member 7 will push the valve core 6 to reset, reopen the fluid outlet 4, and restore the normal air supply state. This ensures safety without affecting daily use.

[0042] Therefore, the overcurrent protection valve provided in the embodiment of the present application can respond to overcurrent conditions in a timely manner and quickly cut off the airflow through its sophisticated structural design, and at the same time has an automatic reset function, which significantly improves the safety of liquefied gas use.

[0043] According to an embodiment of the present application, the cross-sectional area of ​​the valve core 6 is greater than or equal to the area of ​​the fluid outlet 4, so that the valve core 6 can block the fluid outlet 4 to achieve over-current protection.

[0044] According to one embodiment of the present application, referring to Figure 2-Figure 4 As shown, the valve cavity 2 includes an accommodating chamber 8, which is arranged on the side of the valve core 6, and an end of the accommodating chamber 8 close to the fluid outlet 4 is provided with an opening 9 facing the valve core 6, and a blocking ball 10 is arranged in the accommodating chamber 8.

[0045] It can be understood that the valve cavity 2 includes an installation space for accommodating the valve core assembly 101 and an accommodating chamber 8 for accommodating the blocking ball 10 . The accommodating chamber 8 is arranged on the side of the installation space and is connected to the installation space through the opening 9 .

[0046] The specific type of the blocking ball 10 of the present application is not particularly limited, and for example, it can be a spherical component such as a steel ball.

[0047] The overflow protection valve has an inverted state and an upright state. In the inverted state, the blocking ball 10 flows through the opening 9 to between the valve core 6 and the fluid outlet 4 to prevent the valve core 6 from closing the fluid outlet 4; in the upright state, the blocking ball 10 flows through the opening 9 to reset to the accommodating chamber 8.

[0048] It can be understood that the normal state is a state in which the fluid inlet 3 is at the bottom of the valve housing 1 and the fluid outlet 4 is at the top of the valve housing 1. Figure 2 As shown; on the contrary, the inverted state is Figure 2 The entire over-current protection valve is shown in a state in which it is reversed 180°.

[0049] Specifically, when the use of the liquefied gas cylinder is nearing the end and the residual liquefied gas in the cylinder needs to be extracted, the suction device is connected to the fluid outlet 4. The negative pressure generated by the suction may cause the valve core 6 to move to the fluid outlet 4 for blocking, affecting the residual extraction efficiency.

[0050] Therefore, when residual gas extraction is required, that is, residual gas in the gas cylinder is extracted, or in other situations where the overcurrent protection function is not required, the entire overcurrent protection valve can be turned upside down, and the blocking ball 10 automatically moves to between the valve core 6 and the fluid outlet 4 under the action of gravity to form a physical barrier. This effectively prevents the valve core 6 from closing, thereby ensuring that the liquefied gas can be discharged smoothly to meet the residual gas extraction needs.

[0051] When the over-current protection valve returns to the upright position, the blocking ball 10 naturally slides back into the accommodation chamber 8 under the action of gravity, and no longer interferes with the normal operation of the valve core 6. At this time, if the abnormal airflow increases, the valve core 6 can quickly move to the fluid outlet 4 under the action of the airflow pressure to block it, prevent gas leakage, restore the over-current protection function, and ensure safety in use.

[0052] Therefore, the embodiment of the present application introduces the blocking ball 10 and its matching accommodating chamber 8 structure, so that the overcurrent protection valve can adapt to different usage scenarios, and especially adds the ability to temporarily disable the overcurrent protection function in specific circumstances (such as residual extraction operations) without affecting its normal safety protection mechanism.

[0053] The user can simply adjust the position of the overcurrent protection valve according to specific needs (such as daily use or residual pumping operation), and flexibly enable or suspend the overcurrent protection function. In addition, the design of the blocking ball 10 is based on physical principles (gravity), and it can automatically adapt to different usage states without external intervention, simplifying the operation process.

[0054] According to one embodiment of the present application, referring to Figure 2 and Figure 4 As shown, a blocking ring 11 extending toward the valve core 6 is formed on the inner edge of the fluid outlet 4 . In the inverted state, the blocking ring 11 is used to block the blocking ball 10 .

[0055] In this embodiment of the present application, the blocking ring 11 is additionally provided on the inner edge of the fluid outlet 4, and its design purpose is to provide a precise limit point for the blocking ball 10 when the over-current protection valve is inverted. In this way, in the inverted state, when the blocking ball 10 slides onto the valve core 6 under the action of gravity, it will be blocked by the blocking ring 11 and stay accurately at the position between the valve core 6 and the fluid outlet 4, instead of sliding randomly, thereby ensuring the relative smoothness of the air flow channel.

[0056] Through the positioning effect of the blocking ring 11, the blocking ball 10 is restricted to a position that does not affect most of the area of ​​the fluid outlet 4, reducing the obstruction to the gas flow. This is particularly important for residual extraction operations, because it requires that the gas can flow out smoothly while not activating the overcurrent protection mechanism, thereby improving the residual extraction efficiency.

[0057] According to one embodiment of the present application, referring to Figure 2As shown, a guide plate 12 is provided at the opening 9 of the accommodating chamber 8 , and the guide plate 12 is used to guide the flow of the blocking ball 10 .

[0058] In this embodiment of the present application, the guide plate 12 is designed to guide the moving path of the blocking ball 10 when the valve housing 1 is switched between inversion and upright. In the inverted state, the guide plate 12 prompts the blocking ball 10 to slide quickly and accurately along the guide path to between the valve core 6 and the blocking ring 11, ensuring that the switching of the overcurrent protection function is completed in a short time.

[0059] Similarly, when the overcurrent protection function needs to be restored, that is, the valve housing 1 is upright, the guide plate 12 can also ensure that the blocking ball 10 returns quickly and unimpeded to the accommodating chamber 8. This design reduces the delay or jamming that may occur due to the natural fall back due to gravity, thereby improving work efficiency and reliability.

[0060] For example, refer to Figure 2-Figure 4 As shown, a first plate member 13 , a second plate member 14 and a third plate member 15 are provided in the valve housing 1 , and an accommodating chamber 8 is enclosed between the first plate member 13 , the second plate member 14 , the third plate member 15 and the valve housing 1 .

[0061] Specifically, the first plate 13 and the second plate 14 are arranged relatively spaced apart, the outer sides of the first plate 13 and the second plate 14 are connected to the side wall of the valve housing 1, the third plate 15 is connected between the inner sides of the first plate 13 and the second plate 14, and the height of the first plate 13 and the second plate 14 is the same as the height of the valve cavity 2, and the height of the third plate 15 is less than the height of the first plate 13 and the second plate 14, so as to form an opening 9 facing the valve core 6 at the upper part of the accommodating chamber 8.

[0062] A guide plate 12 is provided at the top end of the third plate member 15 . In an upright state, the guide plate 12 is inclined downward in a direction from the second end to the first end of the valve housing 1 , and the top end of the guide plate 12 is higher than the valve core 6 .

[0063] With such a design, the blocking ball 10 can be stably clamped between the blocking ring 11 and the valve core 6 in the inverted state. In addition, the specific height difference between the top of the guide plate 12 and the valve core 6 can be designed according to actual needs to ensure that the blocking ball 10 can automatically flow back to the accommodating chamber 8 when switching from the inverted state to the upright state.

[0064] Furthermore, in order to further improve the fluidity of the blocking ball 10, the top wall of the second end of the valve housing 1 can be designed as an inclined surface or a curved surface.

[0065] According to one embodiment of the present application, referring to Figure 2-Figure 4 As shown, the number of the accommodation chambers 8 is at least two, and the accommodation chambers 8 are arranged at intervals along the circumference of the valve core 6. In this example, the number of the accommodation chambers 8 is three.

[0066] In this embodiment of the present application, each accommodation chamber 8 can accommodate at least one blocking ball 10, and the design of multiple accommodation chambers 8 means that multiple blocking balls 10 can be deployed. When the overcurrent protection valve is upright or inverted, multiple blocking balls 10 work together, which can not only distribute the force more evenly, but also improve the resistance of the overcurrent protection valve to abnormal conditions and enhance the overall mechanical stability.

[0067] A single blocking ball 10 may have problems such as wear and sticking that may affect its function. However, by adopting a design with multiple accommodating chambers 8 and blocking balls 10, even if a problem occurs with an individual blocking ball 10, the other blocking balls 10 can still function normally, thereby greatly improving reliability and reducing the risk of failure due to single point failure.

[0068] In addition, multiple accommodating chambers 8 are arranged at intervals along the circumference of the valve core 6. When the over-current protection valve is in an upright position, these accommodating chambers 8 and the blocking balls 10 therein will not cause significant obstruction to the normal airflow; in the inverted state, the blocking balls 10 are evenly distributed around the fluid outlet 4, which can open the airflow channel more evenly and stably, ensure unobstructed airflow, and at the same time reduce direct obstruction to the fluid outlet 4, thereby optimizing the control accuracy and efficiency of the airflow.

[0069] According to one embodiment of the present application, referring to Figure 2 and Figure 3 As shown, the number of blocking balls 10 in each accommodating chamber 8 is at least two, and each blocking ball 10 is arranged along the direction from the first end to the second end of the valve housing 1 , that is, arranged along the height direction H of the valve housing 1 .

[0070] In this embodiment of the present application, at least two blocking balls 10 are arranged in each accommodating chamber 8. When the overflow protection valve is in an inverted state, these blocking balls 10 work together to more firmly block the valve core 6 from moving toward the fluid outlet 4. Even if the blocking ball 10 in front fails to fully fall into place for some reason, the subsequent blocking ball 10 can provide additional thrust to make it fall into place, thereby ensuring unimpeded airflow and improving reliability.

[0071] According to one embodiment of the present application, referring to Figure 1 and Figure 2 As shown, a bottom cover 16 is disposed at the first end 102 of the valve housing 1 . The bottom cover 16 is provided with a plurality of fluid inlets 3 . A first guide sleeve 17 is disposed in the middle of the bottom cover 16 . One end of the valve stem 5 is inserted into the first guide sleeve 17 .

[0072] In this embodiment of the present application, the first guide sleeve 17 serves as a guide structure for the valve stem 5, providing a precise guide path for the reciprocating motion of the valve stem 5, ensuring that the valve stem 5 remains straight and stable during movement, avoiding the valve core 6 from getting stuck due to deflection or shaking, thereby improving the stability and accuracy of the valve core 6 movement.

[0073] Since the first guide sleeve 17 provides a precise track for the movement of the valve stem 5, the valve core 6 can respond to changes in the airflow more quickly, thereby quickly opening or closing the fluid outlet 4, thereby improving the immediacy and precise control capability of the over-current protection.

[0074] According to one embodiment of the present application, referring to Figure 1-Figure 4 As shown, the second end 103 of the valve housing 1 is provided with an external pipe 18, and the external pipe 18 is connected to the fluid outlet 4. The external pipe 18 can be threadedly connected to the liquefied gas pipeline to improve assembly efficiency.

[0075] According to one embodiment of the present application, referring to Figure 2 and Figure 4 As shown, a fixing frame 19 is provided inside the external pipe 18, and a second guide sleeve 20 is provided on the fixing frame 19 and is arranged opposite to the first guide sleeve 17, and the other end of the valve stem 5 is inserted into the second guide sleeve 20; the elastic member 7 is sleeved on the second guide sleeve 20 and is located between the fixing frame 19 and the valve core 6. Among them, multiple fixing frames 19 can be provided, and multiple fixing frames 19 are arranged around the second guide sleeve 20 at intervals, and a through hole 21 is provided between two adjacent fixing frames 19 for airflow to pass through.

[0076] In this embodiment of the present application, the first guide sleeve 17 and the second guide sleeve 20 are respectively located at the two ends of the valve housing 1, providing bidirectional precise guidance for the valve stem 5, ensuring that the valve stem 5 can move smoothly in a straight line whether in the opening or closing process, significantly improving the stability and reliability of the valve core 6 movement, and reducing the risk of wear or jamming due to deviation or vibration.

[0077] The elastic member 7 is arranged on the second guide sleeve 20 and is located between the fixing frame 19 and the valve core 6. Such a layout is conducive to the elastic member 7 to exert the maximum restoring force effect, ensuring that the valve core 6 can be quickly and forcefully reset after the flow ends to restore normal gas circulation, while maintaining the compactness of the entire valve core assembly structure.

[0078] The double guide structure and the rationally arranged elastic member 7 enable the valve core 6 to respond to changes in airflow more quickly and accurately, and can make switching actions in time according to changes in airflow pressure, effectively preventing excessive gas leakage and improving the efficiency and accuracy of overcurrent protection.

[0079] The provision of the fixing frame 19 enhances the overall structural strength of the external pipe 18, ensuring that it is not easily deformed or damaged during long-term use and pressure changes, thereby extending the service life of the over-current protection valve.

[0080] Therefore, the present application not only enhances the bidirectional stability and precise control capability of the movement of the valve core 6, but also improves the response speed, maintenance convenience and overall durability of the overcurrent protection valve by adding a fixing frame 19 and a second guide sleeve 20 in the external pipe 18 and optimizing the arrangement of the elastic member 7.

[0081] According to an embodiment of the present application, the valve housing 1 and the bottom cover 16 are detachably connected, for example, the two are connected by means of screw connection or clamping.

[0082] Specifically, when the over-current protection valve fails or parts need to be replaced, the detachable bottom cover 16 design allows maintenance personnel to quickly locate the problem and perform targeted maintenance or replacement work, thereby improving maintenance efficiency.

[0083] The above are only preferred embodiments of the present application and are not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An overcurrent protection valve, characterized in that: include: A valve housing is provided with a valve cavity, the valve housing has a first end and a second end opposite to each other, the first end is provided with a fluid inlet, the second end is provided with a fluid outlet, the fluid inlet and the fluid outlet are in communication with the valve cavity; The valve core assembly includes a valve stem, a valve core and an elastic member arranged in the valve cavity, wherein the valve stem can move back and forth between the fluid inlet and the fluid outlet; the valve core is connected to the valve stem and is used to open or close the fluid outlet; the elastic member is sleeved on the valve stem and is used to provide a reset elastic force for the valve core.

2. The over-current protection valve according to claim 1, characterized in that: The valve cavity comprises a containing chamber, the containing chamber is arranged on the side of the valve core, and an end of the containing chamber close to the fluid outlet is provided with an opening toward the valve core, and a blocking ball is arranged in the containing chamber; The over-flow protection valve has an inverted state and an upright state. In the inverted state, the blocking ball flows through the opening to between the valve core and the fluid outlet to prevent the valve core from closing the fluid outlet. In the upright state, the blocking ball flows through the opening and returns to the accommodation chamber.

3. The over-current protection valve according to claim 2, characterized in that: A blocking ring extending toward the valve core is formed on the inner edge of the fluid outlet, and in the inverted state, the blocking ring is used to block the blocking ball.

4. The over-current protection valve according to claim 2, characterized in that: A guide plate is provided at the opening of the accommodating chamber, and the guide plate is used to guide the flow of the blocking ball.

5. The over-current protection valve according to claim 2, characterized in that: The number of the accommodating chambers is at least two, and the accommodating chambers are arranged at intervals along the circumference of the valve core.

6. The over-current protection valve according to claim 5, characterized in that: The number of the blocking balls in each of the accommodating chambers is at least two, and each of the blocking balls is arranged along the direction from the first end to the second end of the valve housing.

7. The over-current protection valve according to any one of claims 1 to 6, characterized in that: The first end of the valve housing is provided with a bottom cover, the bottom cover is provided with a plurality of fluid inlets, and a first guide sleeve is provided in the middle of the bottom cover, and one end of the valve stem is inserted into the first guide sleeve.

8. The over-current protection valve according to claim 7, characterized in that: The second end of the valve housing is provided with an external pipe, and the external pipe is communicated with the fluid outlet.

9. The over-current protection valve according to claim 8, characterized in that: A fixing frame is provided inside the external tube, a second guide sleeve is provided on the fixing frame and is arranged opposite to the first guide sleeve, and the other end of the valve stem is inserted into the second guide sleeve; The elastic member is sleeved on the second guide sleeve and is located between the fixing frame and the valve core.

10. The over-current protection valve according to claim 7, characterized in that: The valve housing is detachably connected to the bottom cover.

Images